OK, let's work through this together. We're starting with 349 and we're going to multiply it by 354, which means we add 349 to itself 354 times.
Step 1: 0 + 349 = 349
Step 2: 349 + 349 = 698
Step 3: 698 + 349 = 1047
Step 4: 1047 + 349 = 1396
Step 5: 1396 + 349 = 1745
Step 6: 1745 + 349 = 2094
Step 7: 2094 + 349 = 2443
Step 8: 2443 + 349 = 2792
Step 9: 2792 + 349 = 3141
Step 10: 3141 + 349 = 3490
Step 11: 3490 + 349 = 3839
Step 12: 3839 + 349 = 4188
Step 13: 4188 + 349 = 4537
Step 14: 4537 + 349 = 4886
Step 15: 4886 + 349 = 5235
Step 16: 5235 + 349 = 5584
Step 17: 5584 + 349 = 5933
Step 18: 5933 + 349 = 6282
Step 19: 6282 + 349 = 6631
Step 20: 6631 + 349 = 6980
Step 21: 6980 + 349 = 7329
Step 22: 7329 + 349 = 7678
Step 23: 7678 + 349 = 8027
Step 24: 8027 + 349 = 8376
Step 25: 8376 + 349 = 8725
Step 26: 8725 + 349 = 9074
Step 27: 9074 + 349 = 9423
Step 28: 9423 + 349 = 9772
Step 29: 9772 + 349 = 10121
Step 30: 10121 + 349 = 10470
Step 31: 10470 + 349 = 10819
Step 32: 10819 + 349 = 11168
Step 33: 11168 + 349 = 11517
Step 34: 11517 + 349 = 11866
Step 35: 11866 + 349 = 12215
Step 36: 12215 + 349 = 12564
Step 37: 12564 + 349 = 12913
Step 38: 12913 + 349 = 13262
Step 39: 13262 + 349 = 13611
Step 40: 13611 + 349 = 13960
Step 41: 13960 + 349 = 14309
Step 42: 14309 + 349 = 14658
Step 43: 14658 + 349 = 15007
Step 44: 15007 + 349 = 15356
Step 45: 15356 + 349 = 15705
Step 46: 15705 + 349 = 16054
Step 47: 16054 + 349 = 16403
Step 48: 16403 + 349 = 16752
Step 49: 16752 + 349 = 17101
Step 50: 17101 + 349 = 17450
Step 51: 17450 + 349 = 17799
Step 52: 17799 + 349 = 18148
Step 53: 18148 + 349 = 18497
Step 54: 18497 + 349 = 18846
Step 55: 18846 + 349 = 19195
Step 56: 19195 + 349 = 19544
Step 57: 19544 + 349 = 19893
Step 58: 19893 + 349 = 20242
Step 59: 20242 + 349 = 20591
Step 60: 20591 + 349 = 20940
Step 61: 20940 + 349 = 21289
Step 62: 21289 + 349 = 21638
Step 63: 21638 + 349 = 21987
Step 64: 21987 + 349 = 22336
Step 65: 22336 + 349 = 22685
Step 66: 22685 + 349 = 23034
Step 67: 23034 + 349 = 23383
Step 68: 23383 + 349 = 23732
Step 69: 23732 + 349 = 24081
Step 70: 24081 + 349 = 24430
Step 71: 24430 + 349 = 24779
Step 72: 24779 + 349 = 25128
Step 73: 25128 + 349 = 25477
Step 74: 25477 + 349 = 25826
Step 75: 25826 + 349 = 26175
Step 76: 26175 + 349 = 26524
Step 77: 26524 + 349 = 26873
Step 78: 26873 + 349 = 27222
Step 79: 27222 + 349 = 27571
Step 80: 27571 + 349 = 27920
Step 81: 27920 + 349 = 28269
Step 82: 28269 + 349 = 28618
Step 83: 28618 + 349 = 28967
Step 84: 28967 + 349 = 29316
Step 85: 29316 + 349 = 29665
Step 86: 29665 + 349 = 30014
Step 87: 30014 + 349 = 30363
Step 88: 30363 + 349 = 30712
Step 89: 30712 + 349 = 31061
Step 90: 31061 + 349 = 31410
Step 91: 31410 + 349 = 31759
Step 92: 31759 + 349 = 32108
Step 93: 32108 + 349 = 32457
Step 94: 32457 + 349 = 32806
Step 95: 32806 + 349 = 33155
Step 96: 33155 + 349 = 33504
Step 97: 33504 + 349 = 33853
Step 98: 33853 + 349 = 34202
Step 99: 34202 + 349 = 34551
Step 100: 34551 + 349 = 34900
Step 101: 34900 + 349 = 35249
Step 102: 35249 + 349 = 35598
Step 103: 35598 + 349 = 35947
Step 104: 35947 + 349 = 36296
Step 105: 36296 + 349 = 36645
Step 106: 36645 + 349 = 36994
Step 107: 36994 + 349 = 37343
Step 108: 37343 + 349 = 37692
Step 109: 37692 + 349 = 38041
Step 110: 38041 + 349 = 38390
Step 111: 38390 + 349 = 38739
Step 112: 38739 + 349 = 39088
Step 113: 39088 + 349 = 39437
Step 114: 39437 + 349 = 39786
Step 115: 39786 + 349 = 40135
Step 116: 40135 + 349 = 40484
Step 117: 40484 + 349 = 40833
Step 118: 40833 + 349 = 41182
Step 119: 41182 + 349 = 41531
Step 120: 41531 + 349 = 41880
Step 121: 41880 + 349 = 42229
Step 122: 42229 + 349 = 42578
Step 123: 42578 + 349 = 42927
Step 124: 42927 + 349 = 43276
Step 125: 43276 + 349 = 43625
Step 126: 43625 + 349 = 43974
Step 127: 43974 + 349 = 44323
Step 128: 44323 + 349 = 44672
Step 129: 44672 + 349 = 45021
Step 130: 45021 + 349 = 45370
Step 131: 45370 + 349 = 45719
Step 132: 45719 + 349 = 46068
Step 133: 46068 + 349 = 46417
Step 134: 46417 + 349 = 46766
Step 135: 46766 + 349 = 47115
Step 136: 47115 + 349 = 47464
Step 137: 47464 + 349 = 47813
Step 138: 47813 + 349 = 48162
Step 139: 48162 + 349 = 48511
Step 140: 48511 + 349 = 48860
Step 141: 48860 + 349 = 49209
Step 142: 49209 + 349 = 49558
Step 143: 49558 + 349 = 49907
Step 144: 49907 + 349 = 50256
Step 145: 50256 + 349 = 50605
Step 146: 50605 + 349 = 50954
Step 147: 50954 + 349 = 51303
Step 148: 51303 + 349 = 51652
Step 149: 51652 + 349 = 52001
Step 150: 52001 + 349 = 52350
Step 151: 52350 + 349 = 52699
Step 152: 52699 + 349 = 53048
Step 153: 53048 + 349 = 53397
Step 154: 53397 + 349 = 53746
Step 155: 53746 + 349 = 54095
Step 156: 54095 + 349 = 54444
Step 157: 54444 + 349 = 54793
Step 158: 54793 + 349 = 55142
Step 159: 55142 + 349 = 55491
Step 160: 55491 + 349 = 55840
Step 161: 55840 + 349 = 56189
Step 162: 56189 + 349 = 56538
Step 163: 56538 + 349 = 56887
Step 164: 56887 + 349 = 57236
Step 165: 57236 + 349 = 57585
Step 166: 57585 + 349 = 57934
Step 167: 57934 + 349 = 58283
Step 168: 58283 + 349 = 58632
Step 169: 58632 + 349 = 58981
Step 170: 58981 + 349 = 59330
Step 171: 59330 + 349 = 59679
Step 172: 59679 + 349 = 60028
Step 173: 60028 + 349 = 60377
Step 174: 60377 + 349 = 60726
Step 175: 60726 + 349 = 61075
Step 176: 61075 + 349 = 61424
Step 177: 61424 + 349 = 61773
Step 178: 61773 + 349 = 62122
Step 179: 62122 + 349 = 62471
Step 180: 62471 + 349 = 62820
Step 181: 62820 + 349 = 63169
Step 182: 63169 + 349 = 63518
Step 183: 63518 + 349 = 63867
Step 184: 63867 + 349 = 64216
Step 185: 64216 + 349 = 64565
Step 186: 64565 + 349 = 64914
Step 187: 64914 + 349 = 65263
Step 188: 65263 + 349 = 65612
Step 189: 65612 + 349 = 65961
Step 190: 65961 + 349 = 66310
Step 191: 66310 + 349 = 66659
Step 192: 66659 + 349 = 67008
Step 193: 67008 + 349 = 67357
Step 194: 67357 + 349 = 67706
Step 195: 67706 + 349 = 68055
Step 196: 68055 + 349 = 68404
Step 197: 68404 + 349 = 68753
Step 198: 68753 + 349 = 69102
Step 199: 69102 + 349 = 69451
Step 200: 69451 + 349 = 69800
Step 201: 69800 + 349 = 70149
Step 202: 70149 + 349 = 70498
Step 203: 70498 + 349 = 70847
Step 204: 70847 + 349 = 71196
Step 205: 71196 + 349 = 71545
Step 206: 71545 + 349 = 71894
Step 207: 71894 + 349 = 72243
Step 208: 72243 + 349 = 72592
Step 209: 72592 + 349 = 72941
Step 210: 72941 + 349 = 73290
Step 211: 73290 + 349 = 73639
Step 212: 73639 + 349 = 73988
Step 213: 73988 + 349 = 74337
Step 214: 74337 + 349 = 74686
Step 215: 74686 + 349 = 75035
Step 216: 75035 + 349 = 75384
Step 217: 75384 + 349 = 75733
Step 218: 75733 + 349 = 76082
Step 219: 76082 + 349 = 76431
Step 220: 76431 + 349 = 76780
Step 221: 76780 + 349 = 77129
Step 222: 77129 + 349 = 77478
Step 223: 77478 + 349 = 77827
Step 224: 77827 + 349 = 78176
Step 225: 78176 + 349 = 78525
Step 226: 78525 + 349 = 78874
Step 227: 78874 + 349 = 79223
Step 228: 79223 + 349 = 79572
Step 229: 79572 + 349 = 79921
Step 230: 79921 + 349 = 80270
Step 231: 80270 + 349 = 80619
Step 232: 80619 + 349 = 80968
Step 233: 80968 + 349 = 81317
Step 234: 81317 + 349 = 81666
Step 235: 81666 + 349 = 82015
Step 236: 82015 + 349 = 82364
Step 237: 82364 + 349 = 82713
Step 238: 82713 + 349 = 83062
Step 239: 83062 + 349 = 83411
Step 240: 83411 + 349 = 83760
Step 241: 83760 + 349 = 84109
Step 242: 84109 + 349 = 84458
Step 243: 84458 + 349 = 84807
Step 244: 84807 + 349 = 85156
Step 245: 85156 + 349 = 85505
Step 246: 85505 + 349 = 85854
Step 247: 85854 + 349 = 86203
Step 248: 86203 + 349 = 86552
Step 249: 86552 + 349 = 86901
Step 250: 86901 + 349 = 87250
Step 251: 87250 + 349 = 87599
Step 252: 87599 + 349 = 87948
Step 253: 87948 + 349 = 88297
Step 254: 88297 + 349 = 88646
Step 255: 88646 + 349 = 88995
Step 256: 88995 + 349 = 89344
Step 257: 89344 + 349 = 89693
Step 258: 89693 + 349 = 90042
Step 259: 90042 + 349 = 90391
Step 260: 90391 + 349 = 90740
Step 261: 90740 + 349 = 91089
Step 262: 91089 + 349 = 91438
Step 263: 91438 + 349 = 91787
Step 264: 91787 + 349 = 92136
Step 265: 92136 + 349 = 92485
Step 266: 92485 + 349 = 92834
Step 267: 92834 + 349 = 93183
Step 268: 93183 + 349 = 93532
Step 269: 93532 + 349 = 93881
Step 270: 93881 + 349 = 94230
Step 271: 94230 + 349 = 94579
Step 272: 94579 + 349 = 94928
Step 273: 94928 + 349 = 95277
Step 274: 95277 + 349 = 95626
Step 275: 95626 + 349 = 95975
Step 276: 95975 + 349 = 96324
Step 277: 96324 + 349 = 96673
Step 278: 96673 + 349 = 97022
Step 279: 97022 + 349 = 97371
Step 280: 97371 + 349 = 97720
Step 281: 97720 + 349 = 98069
Step 282: 98069 + 349 = 98418
Step 283: 98418 + 349 = 98767
Step 284: 98767 + 349 = 99116
Step 285: 99116 + 349 = 99465
Step 286: 99465 + 349 = 99814
Step 287: 99814 + 349 = 100163
Step 288: 100163 + 349 = 100512
Step 289: 100512 + 349 = 100861
Step 290: 100861 + 349 = 101210
Step 291: 101210 + 349 = 101559
Step 292: 101559 + 349 = 101908
Step 293: 101908 + 349 = 102257
Step 294: 102257 + 349 = 102606
Step 295: 102606 + 349 = 102955
Step 296: 102955 + 349 = 103304
Step 297: 103304 + 349 = 103653
Step 298: 103653 + 349 = 104002
Step 299: 104002 + 349 = 104351
Step 300: 104351 + 349 = 104700
Step 301: 104700 + 349 = 105049
Step 302: 105049 + 349 = 105398
Step 303: 105398 + 349 = 105747
Step 304: 105747 + 349 = 106096
Step 305: 106096 + 349 = 106445
Step 306: 106445 + 349 = 106794
Step 307: 106794 + 349 = 107143
Step 308: 107143 + 349 = 107492
Step 309: 107492 + 349 = 107841
Step 310: 107841 + 349 = 108190
Step 311: 108190 + 349 = 108539
Step 312: 108539 + 349 = 108888
Step 313: 108888 + 349 = 109237
Step 314: 109237 + 349 = 109586
Step 315: 109586 + 349 = 109935
Step 316: 109935 + 349 = 110284
Step 317: 110284 + 349 = 110633
Step 318: 110633 + 349 = 110982
Step 319: 110982 + 349 = 111331
Step 320: 111331 + 349 = 111680
Step 321: 111680 + 349 = 112029
Step 322: 112029 + 349 = 112378
Step 323: 112378 + 349 = 112727
Step 324: 112727 + 349 = 113076
Step 325: 113076 + 349 = 113425
Step 326: 113425 + 349 = 113774
Step 327: 113774 + 349 = 114123
Step 328: 114123 + 349 = 114472
Step 329: 114472 + 349 = 114821
Step 330: 114821 + 349 = 115170
Step 331: 115170 + 349 = 115519
Step 332: 115519 + 349 = 115868
Step 333: 115868 + 349 = 116217
Step 334: 116217 + 349 = 116566
Step 335: 116566 + 349 = 116915
Step 336: 116915 + 349 = 117264
Step 337: 117264 + 349 = 117613
Step 338: 117613 + 349 = 117962
Step 339: 117962 + 349 = 118311
Step 340: 118311 + 349 = 118660
Step 341: 118660 + 349 = 119009
Step 342: 119009 + 349 = 119358
Step 343: 119358 + 349 = 119707
Step 344: 119707 + 349 = 120056
Step 345: 120056 + 349 = 120405
Step 346: 120405 + 349 = 120754
Step 347: 120754 + 349 = 121103
Step 348: 121103 + 349 = 121452
Step 349: 121452 + 349 = 121801
Step 350: 121801 + 349 = 122150
Step 351: 122150 + 349 = 122499
Step 352: 122499 + 349 = 122848
Step 353: 122848 + 349 = 123197
Step 354: 123197 + 349 = 123546

So, 349*354 = 123546